Answer and explanation

Correct answer: D.

  1. Step 1: Neutrons , which does not depend on charge.
  2. Step 2: .
Answer
.
Why not the others: : The mass number was given. : The atomic number was given. : Mass and atomic numbers were added.

Practise more Physical and Chemical Principles.

Free questions with an explanation for every one, and full timed Jubilee Institute Admission Test mock tests.